Inicio  /  Agronomy  /  Vol: 13 Par: 9 (2023)  /  Artículo
ARTÍCULO
TITULO

A Method for Selection of Coffee Varieties Resistant to Fusarium stilboides

Getrude Okutoyi Alworah    
Joshua Ondura Ogendo    
Joseph Juma Mafurah    
Elijah Kathurima Gichuru    
Douglas Watuku Miano and Otieno Oliver Okumu    

Resumen

Fusarium bark disease (FBD) of coffee caused by Fusarium stilboides Steyaert has been associated with yield losses and tree death in coffee-growing countries, including Kenya. Varietal resistance is of utmost importance in managing the disease, and the continued increase in host resistance is considered sufficient to control the disease. Therefore, this study investigated the response of four coffee cultivars to F. stilboides. Fifteen hypocotyls from Coffea arabica (Ruiru 11, Batian and SL 28), plus two other coffee species, Coffea canephora (Robusta coffee) and Coffea liberica (Liberica coffee), were inoculated with various concentrations of three F. stilboides isolates (NRF 930/18, TN002B (I), BS008B (A)) using both the injection and drenching methods. The stem injection method was performed by injecting one microliter of the F. stilboides spore solution into the hypocotyl. In the drenching method, coffee seedlings had their roots cut and transplanted in a transplanting mixture, after which 10 mL of the F. stilboides spore solution was applied to the soil surface in each pot. The inoculated hypocotyls were incubated at 24 ± 2 °C for 105 days. The plants were watered regularly as necessary while the development of symptoms was observed and assessed weekly. Disease severity was evaluated using a modified scale of 0?4, while incidence was scored as a percentage of infected seedlings. Coffee seedlings inoculated with F. stilboides developed symptoms such as wilting, stunted growth and defoliation. In the first season, the coffee cultivars of Ruiru 11 and Liberica inoculated with Fusarium stilboides had pronounced severity compared to other cultivars. In the second season, the coffee cultivars Batian and Ruiru 11 had pronounced severity compared to other cultivars. The isolate TN002B (I) was observed to be highly virulent as compared to other isolates. The variation in response to disease infection exhibited by the four cultivars presents a key input in breeding programs for resistance to F. stilboides.

 Artículos similares

       
 
Abdelkrim Lachgar, David J. Mulla and Viacheslav Adamchuk    
One of the challenges in site-specific phosphorus (P) management is the substantial spatial variability in plant available P across fields. To overcome this barrier, emerging sensing, data fusion, and spatial predictive modeling approaches are needed to ... ver más
Revista: Agronomy

 
Muh Farid, Muhammad Fuad Anshori, Riccardo Rossi, Feranita Haring, Katriani Mantja, Andi Dirpan, Siti Halimah Larekeng, Marlina Mustafa, Adnan Adnan, Siti Antara Maedhani Tahara, Nirwansyah Amier, M. Alfan Ikhlasul Amal and Andi Isti Sakinah    
The fruit weight is an important guideline for breeders and farmers to increase marketable productions, although conventionally it requires destructive measurements. The combination of image-based phenotyping (IBP) approaches with multivariate analysis h... ver más
Revista: Agronomy

 
Miao He, Peng Qi, Leng Han and Xiongkui He    
Droplet collectors are commonly utilized to gauge the effect of pesticide deposition on crops. However, the varying surface characteristics of these collectors can lead to disparate data outcomes. Notably, water-sensitive paper is limited in humid enviro... ver más
Revista: Agronomy

 
Diego Rodríguez-Ortega, José Luis Zambrano, Santiago Pereira-Lorenzo, Andrés Torres and Ángel Murillo    
Lupinus mutabilis, also known as tarwi or chocho, is an important agricultural species that has been cultivated in South America since ancient times. Tarwi is native to the Andean regions of Peru, Bolivia, and Ecuador and has very high protein content. D... ver más
Revista: Agronomy

 
Yichao Wang, Jiaxi Zhang, Shilong Shen, Jinming Li, Yanjun Huo and Zhenwei Wang    
In order to address the common difficulties in pulling and harvesting whole cotton stalks, such as high pulling resistance, high miss-pulling rate, and high breakage rate, which severely hinder the recycling of cotton stalks, three different pulling mech... ver más
Revista: Agriculture